0002754: Hud gauges modified by hud-set-frame do not reset on mission reload

Description

Custom hud gauges that have had a hud-set-frame sexp on them will not go back to frame 0 when a mission is reloaded. Seems like it should reset to 0 since a lot of other systems tend to reset to zero as well.

Steps To Reproduce

See modpack with mission to reproduce. Number will go up by 1 every 5 seconds. If you quit the mission or go escape -> restart mission, the number won't go back to zero.